Complaining about cereal!

The Year 3 children have been reading the Shrinking of Treehorn recently where the main character is a boy called Treehorn, who not only is shrinking, but who also loves collecting the little toys and cards that come in his cereal boxes. The children in 3 Owls have pretended that they have opened their cereal boxes and there is no toy inside. Now they are angry and want to know why!